SU555838A3 - The method of producing carbon disulfide - Google Patents

Description

(54) METHOD FOR GETTING SERO-CARBON

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This invention relates to the production of carbon disulfide.

A known method for producing carbon disulfide by reacting saturated carbon dioxide with sulfur vapors and sulfurous anhydride at a temperature of 50 ° -9OO C for 0, 1-2 seconds flj.

The disadvantages of this method are the low yield of carbon disulfide - 42.5 - 50% and the formation of by-products.

In order to eliminate them, olefins, di-olefins, light or heavy fuels are used as hydrocarbons and the process of interaction is carried out for 1.5-4 seconds with sulfur introduced into the reaction mixture in the form of sulfur dioxide and sulfur. amount of 2.1-3.5 atoms per carbon atom.

The proposed method allows to increase the yield of the target product up to 80-91%,

At the same time, the process can take place under atmospheric or elevated pressure. The initial components can be transferred to the reactor separately. Sulfur dioxide (SOj) and hydrocarbons are introduced into the reactor

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preheated go cold, and sulfur is heated, at least to its evaporation temperature or to the temperature of the reaction.

In addition, it is possible to mix sulfur with sulfur dioxide or hydrogen angle with sulfur dioxide, and the third reagent is added separately.

Example. A tubular reactor, surrounded by a furnace and accompanied by a sulfur condenser by an absorber with a sodium hydroxide solution (CW aOH) and a condenser for carbon disulfide and water, is injected on one side with a sulfur mixture.

5 and sulfurous anhydride are brought to the temperature of the reaction, and from the side to ethylene which has been preheated. The appropriate amount of reagents, as well as reaction temperatures and residence times, vary. When leaving the reactor, the excess sulfur is condensed, and the gaseous mixture is then passed through an absorber, and then through a condenser where carbon disulfide and water are separated. The conditions of each test and the results obtained are shown in Table 1. The above analyzes show that the output of carbon disulfide is significantly higher. shags - Besides, it can be seen that the formation of hydrogen sulfide is greatly reduced compared to

Note: (l S sulfur pairs; (2) S total sulfur. 5558 5

Table 2-8 with classical methods using exclusively sulfur, where the CiSi ratio, // 4 S would be in this case equal to 1. Example;, the tests of Example 1 are reproduced, but take propylene as the initial hydrocarbon. The results are shown in Table. 2. Table 1